/// <summary>
/// Returns the status of the printer.
/// </summary>
/// <returns>An object that contains the status of the printer.</returns>
public override PrinterStatus GetStatus()
{
int resultCode;
long statusCode;
var printerStatus = new PrinterStatus();
resultCode = niiPrinter.NiiGetStatus(PrinterName, out statusCode);
if (resultCode != 0)
{
LastException = new NiiStatusException(resultCode);
throw LastException;
}
statusCode = statusCode & 0x1F;
printerStatus.ReceiptPaperNearEmpty = (statusCode & 0x01) > 0;
printerStatus.CoverOpen = (statusCode & 0x02) > 0;
printerStatus.ReceiptPaperEmpty = (statusCode & 0x04) > 0;
printerStatus.OverTemp = (statusCode & 0x08) > 0;
printerStatus.CutterError = (statusCode & 0x10) > 0;
printerStatus.IsOffline = (statusCode & 0x80) > 0;
if (LastStatus == null)
{
LastStatus = printerStatus;
}
return(printerStatus);
}
private void Timer_Elapsed(object sender, ElapsedEventArgs e)
{
try
{
var status = GetStatus();
var comparisonResult = compareLogic.Compare(status, LastStatus);
LastException = null;
LastStatus = status;
if (!comparisonResult.AreEqual)
{
OnPrinterStatusUpdate(EventArgs.Empty);
}
}
catch (NiiStatusException ex)
{
var comparisonResult = compareLogic.Compare(ex, LastException);
LastException = ex;
if (!comparisonResult.AreEqual)
{
OnPrinterStatusUpdate(EventArgs.Empty);
}
}
finally
{
timer.Enabled = true;
}
}